Hygro-thermometer



FIG. 1 is a perspective view of the hygro-thermometer showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a perspective view shown in a configuration of use thereof.

The broken lines shown in the drawings represent portions of the hygro-thermometer that form no part of the claimed design. 

CLAIM The ornamental design for a hygro-thermometer, as shown and described. 